China Petroleum & Chemical Corporation

Research Institute of Petroleum Processing, Sinopec

Chinese Academy of Medical Sciences

Nan Yang

Ming Zhao

Longsheng Tian

Siyuan Qie

Wencheng Tang

Zhifeng Bian

Siliang Gao

Yanyong Liu

Pingping Zuo

A method for separating aromatic hydrocarbons by an extractive distillation, comprising introducing a hydrocarbon mixture containing aromatic hydrocarbons into the middle of an extractive distillation column (); introducing an extraction solvent into the upper part of the extractive distillation column; after an extractive distillation, a raffinate containing benzene is discharged from the top of the column, wherein the benzene content is 3-40% by mass, and sent to the lower part of the extraction column (); the extraction solvent is introduced to the upper part of the extraction column for a liquid-liquid extraction; a raffinate liquid free of aromatic hydrocarbons is discharged from the top of the extraction column; a rich solvent containing benzene is discharged from the bottom of the column and enters the upper-middle part of the extractive distillation column; the rich solvent obtained at the bottom of the extractive distillation column is sent to the solvent recovery column to separate the aromatic hydrocarbons and the solvent. By combining an extractive distillation with a liquid-liquid extraction ingeniously, the method can achieve the separation of aromatic hydrocarbons with a high purity and a high recovery rate, and a significant decrease of the energy consumption in the extraction and separation process.

Method for separating aromatic hydrocarbon using extractive distillation

A method for purification of a styrene-containing feedstock includes steps of introducing the styrene-containing feedstock into the middle of an extractive distillation column, and a solvent for the extractive distillation into the upper part of the column; discharging a raffinate oil from the top of the column, and a rich solvent rich in styrene from the bottom of the column. The rich solvent is then introduced into the middle of the solvent recovery column for vacuum distillation to obtain a crude styrene from the top of the solvent recovery column, and a lean solvent is discharged from the bottom of the solvent recovery column and recycled to the upper part of the extractive distillation column. A portion of the rich solvent is sent to a solvent purification zone for a liquid-liquid extraction using water to obtain a mixture of a styrene polymer and styrene.

Method for purification of a solvent for separation of styrene by extractive distillation and for separation of styrene

The invention discloses a conjugate constructed by conjugating a HSP90 inhibitory peptide to cytotoxic agent via linker and use thereof in the preparing medicine for preventing and/or treating tumor. The mentioned conjugates possess triple anti-tumor effects including targeting delivery, chemotherapy and apoptosis-promotion, which can enhance the anti-tumor efficacy, reduce the dosage, and decrease the toxicity induced by accumulation of chemotherapeutics.

HSP90 inhibitory peptide conjugate and application thereof in treating tumor

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Beijing, China

Nan Yang